Gasification biochar from biowaste (food waste and wood waste) for effective CO2 adsorption
- Authors
- Igalavithana, Avanthi Deshani; Choi, Seung Wan; Dissanayake, Pavani Dulanja; Shang, Jin; Wang, Chi-Hwa; Yang, Xiao; Kim, Sumin; Tsang, Daniel C. W.; Lee, Ki Bong; Ok, Yong Sik
- Issue Date
- 5-6월-2020
- Publisher
- ELSEVIER
- Keywords
- Negative emission technology; Sustainable waste management; Engineered biochar; Sustainable Development Goals (SDGs); Waste recycling/valorization
- Citation
- JOURNAL OF HAZARDOUS MATERIALS, v.391
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF HAZARDOUS MATERIALS
- Volume
- 391
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/55048
- DOI
- 10.1016/j.jhazmat.2019.121147
- ISSN
- 0304-3894
- Abstract
- Biochar is newly proposed as an innovative and cost-effective material to capture CO2. In this study, biochar was produced from feedstock mixtures of food waste and wood waste (i.e., 20%:80% WFW20, 30%:70% WFW30 and 40%:60% WFW40) by gasification. The two biochar adsorbents containing the highest percentage of food waste, i.e., WFW40-K and WFW40-KC, were activated by KOH and KOH + CO2, respectively. The biochar adsorbents were then tested for CO2 adsorption at room temperature of 25 degrees C by using a volumetric sorption analyzer. The WFW20 showed the highest CO2 adsorption capacity, while higher percentage of food waste in the feedstock was unfavorable for the CO2 adsorption. The presence of N and S on the biochar surface was the primary contributor to the high CO2 uptake on WFW20. The development of micropores by KOH activation significantly increased the CO2 adsorption on WFW40-K, but KOH + CO2 activation could not further increase the development of micropores and subsequent CO2 adsorption. Moreover, WFW40-K showed >99% recyclability during 10 consecutive adsorption-desorption cycles. The biochars derived from biowaste (food waste and wood waste) could be effective adsorbents for CO2 capture by providing green solution for food waste recycling.
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- Appears in
Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
- College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles
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